Many of my friends recently shared infographic about “How Instagram Started” or “How Two Guys Made an App in 8 Weeks”. They sure made an app in 8 weeks but UX tricks and technology behind the app are more complex than we think. “Speed Matters” in UX. Slides from 2011 by Instagram co-founder Mike Krieger
Some metrics such as gross margin and customer acquisition cost are too generic, and can be applied to all types of businesses. Also, we should define / set the meaning of success, based on the past data of already successful subscription businesses.